Update libssh2-sys to a version that can build for aarch64-pc-windows-msvc
Update libssh2-sys to a version that can build for aarch64-pc-windows-msvc

aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust